Device for fixing a bulb in a reflector



y 1967 M. LASER DEVICE FOR FIXING A BULB IN A REFLECTOR Filed June 15, 1964 INVENTOR BY five,

United States Patent 3,322,94 DEVICE FOR FIXING A BULB IN A REFLECTOR Max Laser, Tnnnelgatan 20B, Stockholm, Sweden Filed June 15, 1964, Ser. No. 375,123 1 Claim. (Cl. 240-4135) This invention relates to a device for fixing a bulb in its position relative to a reflector.

When screwing a bulb into a bulb socket one always tries to place the bulb in the position where maximum light will be reflected when the lamp is in use. It has, however, been practically impossible to obtain this position without the aid of complicated measuring means.

This invention has for its object to eliminate this difiiculty and is mainly characterized in that the lower, inner portion of the reflector is provided with a holder that is at least partly embracing the bulb body. In a preferred embodiment the holder consists of a circular or differently shaped member provided with upwardly directed, resilient shanks, between which a bulb can be inserted and retained in the desired position relative to the reflector, the lower, circular portion of the holder embracing the neck of the bulb body, while the shanks are resting, at least with their upper portions, against the top part of the bulb body. Two shanks can be used, which are adapted to enclose a part of two opposed upper side portions of the bulb body. The holder shanks are preferably keyhole-shaped.

The invention is described in detail in the following text, reference being made to the accompanying drawing in which an embodiment of the invention is shown.

FIG. 1 shows a reflector with a bulb embraced by a holder according to the invention,

FIG. 2 is a top view of the device shown in FIG. 1, and

FIG. 3 shows an embodiment of the holder.

In the drawing, designates a bulb socket and 11 a bulb to be screwed into the socket. A reflector designated by 12 is here provided with a circular, curved lower por- 3 ,322,945 Patented May 30, 1967 tion 13, the internal surface of which has, in known manner, a reflecting coating. Fastened to the lower portion 13 of the reflector 12 is a holder consisting in this embodiment of a circular member 14 carrying two upwardly directed, mainly keyhole-shaped, and resilient shanks 15, 16. The bulb 11 is inserted between the shanks 15 and 16, and the bulb body is held in the desired position partly by resting approximately against the portions of shanks 15 and 16 in the place where their vertical parts merge into circular shape, partly in that at least the circular portion of the shanks encloses the neck of the bulb body, While at least the upper shank parts are resting resiliently against the upper portion of the bulb body.

I claim:

In combination with a reflector having a bulb socket and reflecting surfaces having a lower circular curved portion attached to said socket and an upper conical portion constituting a continuation of said lower portion; a bulb fixing device comprising a circular member fitting around the top of said socket within said lower portion and two opposed resilient shanks carried by said circular member, each of said shanks having two parallel leg portions and an integral circular portion joining said leg portions and extending upwardly therefrom, the circular portions of the two shanks being located within said conical portion and engaging from opposite sides a bulb being inserted into said socket.

References Cited UNITED STATES PATENTS 1,682,918 9/1928 Luckiesh et al. 240-138 2,061,757 11/1936 Croasdale r 240-138 FOREIGN PATENTS 524,924 5/ 1921 France.

NORTON ANSI-IER, Primary Examiner.

C. R. RHODES, C. C. LOGAN, Assistant Examiners. 

